Ingredients
6 large eggs
3 dried chiles de árbol or 1 tsp. crushed red pepper flakes
3/4 cup soy sauce
3 tbsp. mirin
2 tbsp. unseasoned rice vinegar
Toasted sesame seeds (for serving; optional)
Gently lower eggs into a large saucepan of boiling water. When water returns to a gentle boil, cook 7 minutes. Using a slotted spoon, transfer to a bowl of ice water and let cool 2 minutes (eggs may still be a little warm). Remove eggs from ice water and peel.
Meanwhile, bring chiles, soy sauce, mirin, vinegar, and 2 cups water to a boil in a medium saucepan. Reduce heat; simmer 5 minutes. Remove from heat and add eggs. Let sit at least 1 hour.
The longer you let them sit, the more flavor they’ll pick up, but if you only have an hour, serve egg quarters with some of the pickling liquid drizzled over for extra flavor.
To serve, drain eggs, quarter, and sprinkle with sesame seeds if desired.